Acoustic Scattering from Composite Wind-Wave Surfaces 3: Forward Scatter Intensities and Spatial Coherence at Low and High Frequencies and Small Grazing Angles for 'Bubble-Free' Regimes

Abstract

The present investigation continues the earlier studies of the author embodied in NUSC Technical Document TD-7025 and Technical Report TR-7635. Underwater acoustic scattering from the random moving wind-wave surface of the ocean is again considered. Specifically, one is now concerned with both high 0(5-20 kHz) and low 0(0.2-2.0kHz) frequency emissions and small grazing angles 0(< or =25) with near-surface volume regimes which are effectively bubble-free for moderate to comparatively high mean wind states. Keywords: High frequency, Low frequency scattering; Wind wave surfaces, Forward scatter, Spatial coherence, Oblique, Snell scattering.

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Document Details

Document Type
Technical Report
Publication Date
Jan 23, 1987
Accession Number
ADA185908

Entities

People

  • David Middleton

Organizations

  • Naval Underwater Systems Center

Tags

Communities of Interest

  • Air Platforms
  • Materials and Manufacturing Processes
  • Sensors

DTIC Thesaurus Topics

  • Acoustic Scattering
  • Backscattering
  • Capillary Waves
  • Coherent Scattering
  • Diffraction
  • Doppler Effect
  • Equations
  • Far Field
  • Forward Scattering
  • Frequency
  • Geometry
  • Gravity Waves
  • Grazing Angles
  • Scattering
  • Surface Roughness
  • Three Dimensional
  • Wave Propagation

Fields of Study

  • Physics

Readers

  • Acoustical Oceanography.
  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.